*{
    margin: 0;
    padding: 0;
}
html,body {
    width: 100%;
    height: 100%;
}
.box {
    width: 500px;
    height: 300px;
    margin:20px  auto;
    border: 1px solid black;
}
h2 {
    margin-left: 20px;
}
.search {
    margin-top: 20px;
    margin-left: 20px;
}
input {
    display: inline-block;
    width: 200px;
    margin-left: 20px;
}
button {
    display: inline-block;
    margin-top: 40px;
    margin-left: 20px;
}
.pro {
    background-color: blue;
    margin-left: 200px;
}